body,html
  font-weight: 200
  line-height :1
  font-family :"PingFang SC","STHeitiSC-Light","Helvetica-Light","arial","sana-serif"

.clearfix
  display:inline-block
  &:after
    display: block
    content:""
    clear:both
    font-size:0
    height :0
    visibility :hidden

@media (-webkit-min-device-pixel-ratio: 1.5),(min-device-pixel-ratio: 1.5)
  .border-1px
    &::after
      -webkit-transform :scaleY(0.7)
      transform :scaleY(0.7)
@media (-webkit-min-device-pixel-ratio: 2),(min-device-pixel-ratio: 2)
  .border-1px
    &::after
      -webkit-transform :scaleY(0.5)
      transform :scaleY(0.5)
